i am replacing the front (and only) speakers in my '95 convertable

 

i have established without a doubt that hidden somewhere in the car between the head unit and the speakers there is an amplifier (proved by impedance of speaker and removing power that feeds speakers (green and white))

the problem is i can't find it, it's sh1t and i want to bypass it.

 

i was expecting to find the standard bose speaker and an amp in a plastic box in the door, but no this is whats in the door:

 

(darn , i must learn how to post photos properly )

 

so no amp there, nothing i can see behind the head unit either

 

so i thought i would look in the passenger footwell, which leads me to the next question of could someone tell me what all this is:

 

the ecu is obvious as its labled, so theres the blue thing under it, the silver thing below it, the nissan thing to the left of it and an alpine thing in the dark in the top left

close up of alpine:

 

at first i thought it was an amplifier but starting to think it may be for the origonal japanese alarm system as the connector bottom left looks like it might be for an antena and the wire colours don't seem to match

 

not sure if this is perculier to convertables, '95 models, swb or just my car so any help apreciated

on my car it was in rear near the abs pump rear right under the plastic trim cover have you tried there , its round in shape and has 8 ohms symbol stamped on it amongst other things hth

thats where the amp for the rear speakers on a uk model are but being a convertable i don't have that trim and it seems a strange place to put an amp for the front speakers

Have a look at the wiring diag for the radio here.

 

http://www.300zx-twinturbo.com/manual/el/093.gif

 

It shows a rear amp but not one for the front. Haven't followed the wires to see if runs the front as well however.

 

The location is also shown here

 

http://www.300zx-twinturbo.com/manual/el/113.gif

 

Hope this helps.

 

The complete manual is here

 

http://www.300zx-twinturbo.com/cgi-bin/manual.cgi

 

Darrell

Hi Ian,

 

Its easier to just re-wire the door speakers, mate. The speakers won't work if you just un-plug the amp. You'll get better sound quality with a re-wire as well.

The manual links above won't help with the 'vert, PM me with you e-mail address and I'll send you a PDF file with the correct manual.

 

Keith

...i have established without a doubt that hidden somewhere in the car between the head unit and the speakers there is an amplifier (proved by impedance of speaker and removing power that feeds speakers (green and white))

4 Ohmm is standard for car speakers

 

i was expecting to find the standard bose speaker and an amp in a plastic box in the door, but no this is whats in the door:

Yep, looks just like my old ones did, just before I changed them, I also don't have an amp fitted.

 

close up of alpine:

 

at first i thought it was an amplifier but starting to think it may be for the origonal japanese alarm system

Yep, I'd agree here, looks like some sort of keyless (remote control) alarm controller.

 

 

So, to sum-up..... I don't think you'll find a speaker amp, as not all Zeds were fitted with powered systems. Those speakers are exactly like the ones I removed, including that the cones have gone in the same place. Also they are the three hole fitment as well.

 

 

HTH

 

Dave

4 Ohmm is standard for car speakers

 

 

So, to sum-up..... I don't think you'll find a speaker amp, as not all Zeds were fitted with powered systems. Those

Dave

 

 

yes i agree 4 ohms is standard,

 

i read 3 ohms on my meter at the speaker and 45 ohms at the head unit end of the speaker cable (with hu disconected)

 

i read highish impedance between one end of the speaker cable and the other

 

using the inbuilt wires i get distortion from amplifier clipping well before my head unit clips and poor bass response

 

disconnecting the power supply to the wire that i belive powers the hidden amp stops the speakers working

 

all of the above lead me to belive that their is a hidden amp

 

 

in the end i ran new wires and it all sounds good :)

Well, either way, you've got it sorted, and that's the important part :D Well done.